A man wearing body armor and armed with a rifle stormed into a Napa County veterans home Friday morning and has taken at least three people hostage, according to authorities.

Law enforcement from the Napa County, the California Highway Patrol and FBI have surrounded the Veterans Home of California in Yountville, which is the largest veterans' residence community in the United States.

Officer John Fransen with the CHP confirmed shots have been fired and it is believed shots were fired at a deputy. Robert Nacke, also with CHP, told reporters at around 1:20 p.m. that there have been no reported injuries.

During a 2 p.m. press conference, the first time authorities formally spoke to media about the situation, Sheriff John Robertson with Napa County said law enforcement knows the identity of the suspect but would not release his name. Police, he said, have tried calling the man's cell phone but he has not answered. Robertson said they do not know what motivated the man to begin shooting or take hostages.

Robertson confirmed that "many bullets" were fired but reiterated that they do not know of any injuries to the hostages, suspect or deputies.

Capt. Chris Childs with the CHP said hostages are Pathway Home employees who work with veterans living at the facility.

Events manager Elizabeth Naylor, who was working about 10 miles north of the veterans' home, said she heard waves of emergency sirens. She said she's lived in Yountville since 1995 and is rattled about a shooting so close to home.

"I don't know the world we live in today, I really don't," she said. "This is a little community and we all know each other. Napa Valley is a wonderful, beautiful place and to know this is in your background, it's unsettling."

The home posted an update on its Facebook page at 11:20 a.m. Friday, noting it has activated its emergency response protocol and are working with law enforcement.

About 1,000 male and female disabled and elderly veterans from World War II and the wars in Korea, Vietnam, Afghanistan and Iraq live at the home, according to its website.

The home is near several popular Napa Valley wineries and restaurants and borders Vintners Golf Club, where golfers have been evacuated from the course.

Residents from the home often golf at the club for free, said Jason Boldt at Vintners. "They are friends and family," he said. "We're hoping that everyone is safe."

Authorities have asked tourists and those visiting wine county stay away from the home and surrounding area.

The state Veterans Affairs department says the home opened in 1984. It offers residential accommodations with recreational, social, and therapeutic activities for independent living, according to the home's website. The grounds also are include a 1,200-seat theater, a 9-hole golf course, a baseball stadium, bowling lanes, a swimming pool and a military Base Exchange branch store.

Yountville Vet home dates to 1884. Largest vet home in the USA. Has 1000 aged or disabled vets (both men and women): World War II, Korean War, Vietnam War, Desert Storm, and Operation Enduring Freedom/Operation Iraqi Freedom now live at the home. #abc7now